Transceiver maximum input frequency?

[allanvv]

I need to use the 74LVx16245 family of logic as a buffer for 100MHz inputs. However, when looking at the datasheet of several of these devices, none of them list a maximum input frequency or pulse width. Am I supposed to be able to derive it from other datasheet specs?

See:

https://media.digikey.com/pdf/Data Sheets/Philips Semiconductor PDFs/74LVC(H)16245A.pdf

or

https://www.fairchildsemi.com/ds/74/74LCX16245.pdf

Also, is there a listing of what all the letters mean in the CMOS logic family? I can't figure out what the difference is between all the 74LV's, like: 74LVC, 74LVT, 74LVCH, 74LCX, 74ALVCHR.

edit: Did some more research and found this quote:

"For products that are not clocked (e.g., buffers and transceivers) for which you would like to know the maximum operating frequency, an estimate is the fclock value from a comparable clocked part. For example, an LVC16245 maximum data frequency is conservatively similar to the LVC16374 maximum clock frequency. However, this is highly dependent upon load, and is a rule-of-thumb only"

The LVC16374 series is specced at 100/150MHz. It doesn't sound safe to just use these buffers and assume that they'll pass the data along correctly, right?

 

[yuvko]

basicaly, the max input frequency will be 1/(Tphl+Tplh), when those two values are stated in the datasheet. please note however, that it will change depending on the load capacitance.

regrding the logic families, have a look at:
Glue Logic IC Family Selection Guide